WO2005056877A1 - Ceramic material and method for repairing thermal insulation layers with local damage - Google Patents

Ceramic material and method for repairing thermal insulation layers with local damage Download PDF

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Publication number
WO2005056877A1
WO2005056877A1 PCT/DE2004/002625 DE2004002625W WO2005056877A1 WO 2005056877 A1 WO2005056877 A1 WO 2005056877A1 DE 2004002625 W DE2004002625 W DE 2004002625W WO 2005056877 A1 WO2005056877 A1 WO 2005056877A1
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WO
WIPO (PCT)
Prior art keywords
ceramic
ceramic material
thermal insulation
local damage
insulation layers
Prior art date
Application number
PCT/DE2004/002625
Other languages
German (de)
French (fr)
Inventor
Erwin Bayer
Thomas Kränzler
Stefan Schneiderbanger
Jürgen STEINWANDEL
Original Assignee
Mtu Aero Engines Gmbh
Daimlerchrysler Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mtu Aero Engines Gmbh, Daimlerchrysler Ag filed Critical Mtu Aero Engines Gmbh
Publication of WO2005056877A1 publication Critical patent/WO2005056877A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process

Definitions

  • the invention relates to a ceramic material and a method for repairing thermal insulation layers with local damage according to the preamble of patent claims 1 and 4.
  • a ceramic material for repairing thermal insulation layers with local damage is known from EP 1 197 585 A2.
  • the ceramic material in the form of a ceramic paste is a mixture of ceramic powder, a ceramic binder and a solvent.
  • the ceramic powder is in particular a mixture of heat-resistant oxides, in particular oxides of aluminum, zirconium, hempium, magnesium and silicon.
  • the ceramic binder is a compound based on silicone or phosphate. Alcohols in particular are used as solvents.
  • the ceramic paste is in the previously cleaned local damage to the surface of the thermal barrier coating, e.g. introduced a hot gas turbine.
  • a so-called ceramic repair layer is formed, which has a matrix in which the particles of the ceramic powder are embedded.
  • a disadvantage of the ceramic paste from EP 1 197 585 A2 is that at the junctures of the ceramic repair layer with the surrounding original thermal insulation layer there is no sufficient temperature stability for the application. Another disadvantage is the time-consuming temperature treatment, which is necessary to form the ceramic repair layer.
  • Advantageous embodiments of the invention are the subject of dependent claims.
  • the ceramic slip is subjected to a thermal treatment, e.g. Sintering pore-forming material, e.g. Plastic, admitted.
  • a thermal treatment e.g. Sintering pore-forming material, e.g. Plastic
  • An advantage here is that the pore formers can be removed without residue due to the thermal treatment.
  • the thermal treatment by means of which a ceramic repair layer is formed from the ceramic material according to the invention is carried out according to the invention by means of pulsed energy coupling into the ceramic material.
  • Pulsed laser, electron beam or microwave methods can advantageously be used.
  • An advantage here is that locally high energies can be injected into the ceramic material, as a result of which locally high temperatures can be generated. This ensures good sintering locally. With this method, however, the temperature of the entire thermal insulation layer remains far below the melting temperature of the base material, eg Ni-based substrate to which the thermal barrier coating is applied. With the method according to the invention, a time-saving thermal treatment of the ceramic material introduced into the local damage is thus possible to form a repair layer.

Abstract

The invention relates to a ceramic material and method for repairing thermal insulation layers with local surface damage, whereby the ceramic is enriched in a binder, applied to the local damage and subsequently heat treated. According to the invention, the ceramic material is a ceramic slip, comprising a nanoscale powder made from the thermal insulation material of the thermal insulation layer for repair and the heat treatment to form a repair layer is carried out by means of pulsed energy coupling.

Description

Keramisches Material und Verfahren zum Reparieren von Wärmedämmschichten mit lokalen Beschädigungen Ceramic material and method for repairing thermal insulation layers with local damage
Die Erfindung betrifft ein keramisches Material und ein Verfahren zum Reparieren von Wärmedämmschichten mit lokalen Beschädigungen gemäß dem Oberbegriff des Patentanspruchs 1 und 4.The invention relates to a ceramic material and a method for repairing thermal insulation layers with local damage according to the preamble of patent claims 1 and 4.
Aus EP 1 197 585 A2 ist ein keramisches Material zum Reparieren von Wärmedämmschichten mit lokalen Beschädigungen bekannt. Das in Form einer keramischen Paste vorliegende keramische Material ist ein Gemisch aus keramischem Pulver, einem keramischen Bindemittel und einem Lösemittel. Das keramische Pulver ist insbesondere eine Mischung aus hitzebeständigen Oxiden, insbesondere Oxiden von Aluminium, Zirkonium, Hanfium, Magnesium und Silizium. Das keramische Bindemittel ist eine Verbindung auf Silikon- oder Phosphatbasis. Als Lösemittel werden insbesondere Alkohole verwendet.A ceramic material for repairing thermal insulation layers with local damage is known from EP 1 197 585 A2. The ceramic material in the form of a ceramic paste is a mixture of ceramic powder, a ceramic binder and a solvent. The ceramic powder is in particular a mixture of heat-resistant oxides, in particular oxides of aluminum, zirconium, hempium, magnesium and silicon. The ceramic binder is a compound based on silicone or phosphate. Alcohols in particular are used as solvents.
Die keramische Paste wird in die zuvor gereinigte lokale Beschädigung der Oberfläche der Wärmedämmschicht, z.B. einer Heissgasturbine eingebracht. Mittels thermischer Behandlung der keramischen Paste bildet sich eine sogenannte keramische Repairschicht, welche eine Matrix aufweist, in der die Partikel des keramischen Pulvers eingelagert sind. Ein Nachteil der keramischen Paste aus EP 1 197 585 A2 ist, dass an den Verbindungsstellen der keramischen Repairschicht mit der umgebenden ursprünglichen Wärmedämmschicht keine für die Anwendung ausreichende Temperaturstabilität vorhanden ist. Ein weiterer Nachteil ist die zeitintensive Temperaturbehandlung, welche zur Bildung der keramischen Repairschicht nötig ist.The ceramic paste is in the previously cleaned local damage to the surface of the thermal barrier coating, e.g. introduced a hot gas turbine. By means of thermal treatment of the ceramic paste, a so-called ceramic repair layer is formed, which has a matrix in which the particles of the ceramic powder are embedded. A disadvantage of the ceramic paste from EP 1 197 585 A2 is that at the junctures of the ceramic repair layer with the surrounding original thermal insulation layer there is no sufficient temperature stability for the application. Another disadvantage is the time-consuming temperature treatment, which is necessary to form the ceramic repair layer.
Es ist somit Aufgabe der Erfindung ein keramisches Material zu schaffen, welches als keramische Repairschicht eine hohe Temperaturbeständigkeit mit der Wärmedämmschicht aufweist. Eine weitere Aufgabe besteht in der Angabe eines Verfahrens, mit welchem die keramische Repairschicht schnell gebildet werden kann. Diese Aufgabe wird mit dem keramischen Material gemäß Patentanspruch 1 und dem Verfahren gemäß Patentanspruch 4 gelöst. Vorteilhafte Ausführung der Erfindung sind Gegenstand von Unteransprüchen.It is therefore an object of the invention to provide a ceramic material which, as a ceramic repair layer, has a high temperature resistance with the heat insulation layer. Another object is to specify a method with which the ceramic repair layer can be quickly formed. This object is achieved with the ceramic material according to claim 1 and the method according to claim 4. Advantageous embodiments of the invention are the subject of dependent claims.
Erfindungsgemäß ist das keramische Material ein keramischer Schlicker umfassend ein nanoskaliges Pulver aus dem Wärmedämmschichtmaterial der zu reparierenden Wärmedämmschicht. Vorteilhaft ist das nanoskalige Pulver Yttrium teilstabilisiertes Zirkonoxid, Lanthan- Magnesium-Hexaaluminat oder ein Gemisch daraus.According to the invention, the ceramic material is a ceramic slip comprising a nanoscale powder made from the thermal barrier coating material of the thermal barrier coating to be repaired. The nanoscale powder yttrium partially stabilized zirconium oxide, lanthanum-magnesium hexaaluminate or a mixture thereof is advantageous.
Mit dem erfindungsgemäßen keramischen Material ist es somit möglich, in der lokalen Beschädigung eine keramische Repairschicht zu erzeugen, welche die gleiche Struktur (Matrix) und Schichtzusammensetzung aufweist wie die ursprüngliche Wärmedämmschicht. Dadurch kommt es insbesondere an den Verbindungsstellen der Repairschicht mit der umgebenden ursprünglichen Wärmedämmschicht zu einer hohen Temperaturstabilität und Festigkeit, dass die Repairschicht und ursprüngliche Wärmedämmschicht gleiche physikalische Eigenschaften aufweisen.With the ceramic material according to the invention, it is thus possible to produce a ceramic repair layer in the local damage, which has the same structure (matrix) and layer composition as the original thermal insulation layer. As a result, in particular at the junctures of the repair layer with the surrounding original thermal insulation layer, there is a high temperature stability and strength that the repair layer and original thermal insulation layer have the same physical properties.
In einer vorteilhaften Ausführung der Erfindung ist dem keramischen Schlicker ein bei einer thermischen Behandlung, z.B. Sinterung porenbildendes Material, z.B. Kunststoff, zugegeben. Damit ist es möglich, in der keramischen Repairschicht die Porosität der ursprünglichen Wärmedämmschicht nachzubilden. Ein Vorteil hierbei ist, dass aufgrund der thermischen Behandlung der Porenbildner rückstandfrei entfernt werden kann.In an advantageous embodiment of the invention, the ceramic slip is subjected to a thermal treatment, e.g. Sintering pore-forming material, e.g. Plastic, admitted. This makes it possible to reproduce the porosity of the original thermal insulation layer in the ceramic repair layer. An advantage here is that the pore formers can be removed without residue due to the thermal treatment.
Die thermische Behandlung mittels der aus dem erfindungsgemäßen keramischen Material eine keramische Repairschicht gebildet wird, wird erfindungsgemäß mittels gepulster Energieeinkopplung in das keramische Material durchgeführt. Vorteilhaft können gepulste Laser-, Elektronenstrahl- oder Mikrowellenverfahren verwendet werden.The thermal treatment by means of which a ceramic repair layer is formed from the ceramic material according to the invention is carried out according to the invention by means of pulsed energy coupling into the ceramic material. Pulsed laser, electron beam or microwave methods can advantageously be used.
Ein Vorteil hierbei ist, dass in das keramische Material lokal hohe Energien eingekoppelt werden können, wodurch lokal hohe Temperaturen erzeugt werden können. Dadurch wird lokal eine gute Sinterung gewährleistet. Die Temperatur der gesamten Wärmedämmschicht bleibt bei diesem Verfahren allerdings weit unterhalb der Schmelztemperatur des Grundwerkstoffs, z.B. Substrat auf Ni-Basis, auf das die Wärmedämmschicht aufgebracht ist. Mit dem erfindungsgemäßen Verfahren ist somit eine zeitsparende thermische Behandlung des in die lokalen Beschädigungen eingebrachten keramischen Materials zur Bildung einer Repairschicht möglich. An advantage here is that locally high energies can be injected into the ceramic material, as a result of which locally high temperatures can be generated. This ensures good sintering locally. With this method, however, the temperature of the entire thermal insulation layer remains far below the melting temperature of the base material, eg Ni-based substrate to which the thermal barrier coating is applied. With the method according to the invention, a time-saving thermal treatment of the ceramic material introduced into the local damage is thus possible to form a repair layer.

Claims

Patentansprüche claims
1. Keramisches Material zum Reparieren von Wärmedämmschichten, welche auf der Oberfläche lokalen Beschädigungen aufweisen, wobei das keramische Material mit einem Binder angereichert ist und in die lokale Beschädigung eingebracht und anschließend thermisch behandelt wird, dadurch gekennzeichnet, dass das keramische Material ein keramischer Schlicker umfassend ein nanoskaliges Pulver aus dem Wärmedämmschichtmaterial der zu reparierenden Wärmedämmschicht ist.1. Ceramic material for repairing thermal insulation layers which have local damage on the surface, the ceramic material being enriched with a binder and introduced into the local damage and then thermally treated, characterized in that the ceramic material comprises a ceramic slip is nanoscale powder from the thermal barrier material of the thermal barrier layer to be repaired.
2. Keramisches Material nach Anspruch 1, dadurch gekennzeichnet, dass dem keramischen Schlicker ein bei einer thermischen Behandlung porenbildendes Material, insbesondere Kunststoff zugegeben ist.2. Ceramic material according to claim 1, characterized in that a pore-forming material, in particular plastic, is added to the ceramic slip during a thermal treatment.
3. Keramisches Material nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das nanoskalige Pulver Yttrium teilstabilisiertes Zirkonoxid, Lanthan- Magnesium-Hexaaluminat oder ein Gemisch daraus ist.3. Ceramic material according to one of the preceding claims, characterized in that the nanoscale powder is yttrium partially stabilized zirconium oxide, lanthanum-magnesium-hexaaluminate or a mixture thereof.
4. Verfahren zur Bildung einer keramischen Repairschicht mittels thermischer Behandlung eines keramischen Materials nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass in das keramische Material Energie gepulst eingekoppelt wird.4. A method for forming a ceramic repair layer by means of thermal treatment of a ceramic material according to one of the preceding claims, characterized in that pulsed energy is coupled into the ceramic material.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass zur gepulsten Energieeinkopplung gepulste Laser-, Elektronenstrahl- oder Mikrowellenverfahren eingesetzt werden. 5. The method according to claim 4, characterized in that pulsed laser, electron beam or microwave methods are used for the pulsed energy coupling.
PCT/DE2004/002625 2003-12-10 2004-11-26 Ceramic material and method for repairing thermal insulation layers with local damage WO2005056877A1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2062999A2 (en) * 2007-10-29 2009-05-27 General Electric Company A method of treating a thermal barrier coating and related articles
EP2113586A3 (en) * 2008-05-01 2010-05-12 United Technologies Corporation Low cost non-line-of-sight portective coatings
US8496990B2 (en) 2008-09-08 2013-07-30 Rolls-Royce Plc Method of repairing a coating on an article
US10494926B2 (en) 2017-08-28 2019-12-03 General Electric Company System and method for maintaining machines
US10717166B2 (en) 2016-12-02 2020-07-21 General Electric Company Motorized apparatus for use with rotary machines

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2062999A2 (en) * 2007-10-29 2009-05-27 General Electric Company A method of treating a thermal barrier coating and related articles
EP2062999A3 (en) * 2007-10-29 2012-01-25 General Electric Company A method of treating a thermal barrier coating and related articles
EP2113586A3 (en) * 2008-05-01 2010-05-12 United Technologies Corporation Low cost non-line-of-sight portective coatings
US8496990B2 (en) 2008-09-08 2013-07-30 Rolls-Royce Plc Method of repairing a coating on an article
US10717166B2 (en) 2016-12-02 2020-07-21 General Electric Company Motorized apparatus for use with rotary machines
US10494926B2 (en) 2017-08-28 2019-12-03 General Electric Company System and method for maintaining machines

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